Steam-generator.



No. 890,090. PATENTED JUNE 9 1908.

J. 0. PARKER. STEAM GENERATOR.

APPLICATION FILED 1220.16, 1904.

3 SHEETS-SHEET 1.

- WITNESSES." A I INVEIVTOR.

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PATENTED JUNE 9; 1908. 'J.G.PAB,KER. STEAM GENERATOR.

APPLICATION FILED DEO.16,1904.'

3 SHEETS'SHEET 3.

| l I l WITNESSES:

INVENTOR: m. a Fm THE NORRIS FEYERS ca, WASNYNG'VD JOHN C. PARKER, OF PHILADELPHIA, PENNSYLVANIA.

STEAM-GENERATOR.

Original application filed January 8, 1901, Serial No. 41,859.

Specification of Letters Patent.

Patented June 9, 1908.

Divided in part and this application filed December 16, 1904. Serial No. 237,084.

To all whom it may concern:

Be it known that I, JOHN C. PARKER, a citizen of the United States, residing at Philadelphia, county of Philadelphia, and State of Pennsylvania, have invented certain Improvements in Steam-Generators, of which the following is a specification.

This invention is, in part, divided from my application filed January 8, 1901, No. 41,859, and has for its leading purpose the production of an improved steam generating system having increased efficiency, economy and simplicity, providing a compact, durable and safe construction.

It comprises an improved steam and water drum having a water compartment and a steam compartment, with means for equilibrating the pressure between them, and means for collecting and discharging deposits, in combination with several sets of ele ments comprising tubes connected respectively with the water compartment and the steam compartment, with means for preventing a reversal of the flow from the water compartment downwardly through the tubes and means for cleaning the tubes of deposits of heat insulating matter.

Means are provided for introducing the feed water into upper coils of the tubes, carrying it downwardly through these coils, thence upwardly into the steam compartment and back to the water compartment, in combination with means for carrying water from the water compartment downwardly through lower coils which discharge upwardly into the steam compartment. There is thus provided by this two stage operation a combined gravity and forced flow, the water flowing in the same direction in both feeding and evaporating which reduces the deposition of matter and the formation of scale that takes place in the usual mode of operation. This two stage operation obviates the usual wide variation in the quantity and temperature of the water in the tubes due to variation in the rate of feeding and stopping the feed pump. In previous operations, upon stopping the feed pump, the water in the upper tubes becomes heated, evaporation takes place higher up and the lower tubes become drier. When the feed water is on again, it runs directly into the tubes and condenses the steam, resulting in a rapid drop of the water from the drum into the tubes and in undesirable fluctuations.

In the accompanying drawings, Figure 1 represents a vertical longitudinal section of a steam generator embodying my improvements: Fig. 2 represents a vertical transverse section thereof, the left half being taken on the line 2-2 and the right half on the line 22 of Fig. 1: Fig. 3 represents a vertical transverse section taken on the line 33 of Fig. 1: Fig. 4 represents a sectional view showing the relation of the automatic cleaning apparatus to the tubes: Fig. 5 represents a vertical sectional view through a junction boX and the non return or check valve used for preventing reverse flow: Fig. 6 represents a top plan view of the valve shown in section in Fig. 5: Fig. 7 represents diagrammatically a top plan view of lower elements or coils of the tubes with the junction boX therefor: Fig. 8 represents diagrammatically an end elevation of the lower elements or coils with the junction boX therefor: Fig. 9 represents diagrammatically a side elevation of the constructions illustrated in Figs. 7 and 8: Fig. 10 represents diagrammatically a top plan view of the upper coil: Fig. 11 represents diagrammatically a side elevation of the construction illustrated in Fig. 10: and Fig. 12 represents diagrammatically an end elevation of the construction illustrated in Fig. 10.

As shown .in the drawings, the drum or chamber 1 has therein the diaphragms 2 and 3 forming a water compartment 4 in the lower part and a steam compartment 5 in the upper part thereof, the steam compartment having a pocket 5 between the heads of the drum and water compartment, and the drum having the man hole 6 for access to the several parts. The diaphragm 3, forming the head of the water compartment, has the ports 7 and 8 therein controlled respectively by the swinging valves 9 and 10, therespective valves closing their ports when the pressure therein from the compartment 4 is in excess of that from the compartment 5, and vice versa. A by-pass 2, in the diaphragm 2, may be used to rovide a vent for relieving the pressure of steam in the corn artment 4 which otherwise may unduly orce the water out of the compartment into the tubes. When single generating units are employed and the fire doors are open, or the fire is dead and cold air flows through the grate, the variations in pressure may otherwise cause water to be forced through the tubes into the steam compartment.

The shield 11, of inverted V-shape cross section, extends longitudinally of the water compartment and has its sides loosely supported on the bottom thereof so that deposits can be drawn under the shield into the chamber 12 and discharged into the blow off pipe 13, this construction acting to distribute the pressure and the swee ing action in the water compartment by wiich deposits are removed.

The compartment 4 discharges water by the down-take tubes 14 and 15, through the tubes 16 which are arranged in continuous coils carrying the water transversely and downwardly to the up-cast tubes 17 which discharge into the steam compartment 5, a check or non return valve 18 in the down take at the head of the top coil preventing reverse flow. The tube 14 projects into the compartment 4 to a point above the mud channels formed by and on either side of the shield 11, and the tube 17 projects a short distance into the compartment 5.

Y A pi e 19, connected with the head of the top 001 of the tubes 16 and separated from the water compartment 4 by the check or non-return valve 18, discharges feed water into the upper coils which carry it transversely and downwardly, discharging it through the up-cast 17 into the compartment 5, whence it flows into the compartment 4 through the port 8.

A valve controlled blow-off pipe 20 is connected with the discharge end of the coiled tubes 16, by means of which soli water can beforced through them to sweep out the mud, the check valve 21 preventing a reverse flow of steam from the compartment 5' through the upcast 17. The compartment 4 also discharges water by the down take tubes 22 through the coiled tubes 23 which are arranged in sets having non-return valves 18 in the heads thereof. Each down take discharges by a three way junction box 24 into two sets of continuous tubes, the respective sets extending transversely and downwardly to an upcast 25 discharging into thecompartment 5.

The check or non-return valves have a sleeve 26 adapted to slip through the hand holes and fit within the tubes, as 15, the sleeve contracting from the top and either side to a seat 27 inclined to the axis thereof. Hinge bearings 28, projecting from the upper part of the sleeve, carry a pin 29 which passes therethrough and through the narrow hinge bearings 30 projecting from a valve lid 31 which fits the seat 27. The parts 30 extend far enough rearwardly to be engaged by the lugs 32 between the bearings 28 and the connection between the parts 28 and 30 is made l quite free, to provide the necessary control for the lid 31 and the necessary freedom to prevent sticking. The valves are readily accessible by removing the covers 33 from the hand holes 34 of the junction boxes 24 or 35 which connect the tubes.

The arrangement ofthe tubes permits the small pipes 36 to be dropped from the manifold 37 between the adjacent vertical tiers of tubes 16 and 23. The small pipes have their lower ends closed and are each provided with holes 38 through which steam is blown to remove the soot deposited on the tubes. It will be seen that each hole delivers a jet that sweeps a section of each of four surrounding tubes, and each interior tube has its quadrants swept by the four jets surrounding it. The several jets acting together to. prevent the lateral divergence that-would otherwise dissipate the force of a single unsupported jet, a body of steam is swept along the entire length of the tubes of sufficient force to thoroughly clean them.

The lower row of the tubes 23 is dropped at their forward ends to provide an upward inclination toward the upcasts 25 in the tubes connected therewith, so that in starting the circulation is induced from these tubes through the upcasts and water hammer is avoided, to give space for the free expansion of the tubes and for the separation or removal of tubes without disturbing others, and to give an upward inclination to the lower baffle 40.

The feed tubes 16 are preferably separated from the evaporation tubes 23 by a baffle 40 which with the baffle 40 provides two passes for the products of combustion flowing from the furnace chamber 39. In the lower and more highly heated pass, evaporation is effected, while the water returned to the water compartment is recirculated.

Having described my invention, I claim 1. In a steam generator, a steam and water chamber, a diaphragm therein dividing said chamber into two compartments, one of said compartments having a pocket communicating with the other of said compartments, water circulating and steam generating tubes connecting said compartments, and mechanism for controlling the communication between said compartments, substantially as specified.

2. In a steam generator, a steam and water drum, a diaphragm dividing said drum into an upper and lower compartment for steam and water respectively, a port and a pocket through which said compartments communicate, and an automatic valve for controlling said port so that water is permitted to flow from said upper into said lower compartment and is prevented from flowing in the reverse direction, substantially as specified.

3. In a steam generator, a steam and water drum, and a diaphragm dividing said drum'into an upper and lower compartment, said upper compartment having a depend ing pocket between an end of said drum and said lower compartment, substantially as specified.

4. In a steam generator, a steam and water drum, a diaphragm dividing said drum into an upper and lower compartment, said upper compartment having a depending ocket between an end of said drum and said Ibwer compartment, an upper and a lower port through which said pocket and'lower compartment communicate, and automatic valves for controlling said ports, substan tially as specified.

5. In a steam generator, a drum having a water compartment and a steam compartment, a set of tubes, a down take connecting said water compartment with said tubes, and an upcast connecting said tubes with said steam compartment independently of said water compartment, substantially as specified.

6. In a steam generator, a water compartment, a steam compartment, an upper set of tubes, a down take connecting said water compartment with said tubes, an upcast connecting said tubes with said steam compartment, a lower set of tubes, a down take connecting said water compartment with said lower set of tubes, and an upcast connecting said lower set of tubes with said steam compartment, substantially as specified.

7. In a steam generator, a drum, an upper set of tubes, a down take connecting said drum and tubes, an upcast connecting said tubes and drum, means for introducing feed water through said tubes to said drum, a lower set of tubes, a down take connecting said drum and lower tubes, and an upcast connecting said lower tubes and drum, substantially as specified.

8. In a steam generator, a water compartment, a steam com artment, a set of tubes connected with saic water and steam compartments, means for introducing feed water through said tubes to one of said compartments, and a second set of tubes connected with said water and steam compartments, substantially as specified.

9. In a steam generator, an upper set of continuous tubular coils and means for preventing reverse fiow through said coils, in combination with a lower set of continuous tubular coils and means for preventing a reverse fiow through said lower coils, substantially as specified.

10. In a steam generator, a structure, for containing steam and water, an upper set of continuous tubular coils connected with said structure, means for reventing reverse'fiow through said coils, a ower set of continuous tubular coils connected with said structure,

and means for reventing reverse fiow through said. lower coil s, substantially as specified.

11.. In a steam generator, a water compartment, a steam compartment, an upper set of continuous tubular coils connected with said water compartment, a valve for preventing reverse fiow through said coils to said water compartment, means connecting said coils with said. steam compartment, a lower set of continuous tubular coils connected with said water compartment, a valve for preventing reverse fiow through said lower coils to said water compartment, and means connecting said lower coils with said steam compartment, substantially as specified.

' 12. In asteam generator, awater compartment and a steam compartment, in combination with an upper set of continuous tubes arranged in superposed coils extending transversely, and lower sets of continuous tubes arranged in plural coils extending vertically, substantially as specified.

13. In a steam generator, awater compartment, a steam compartment, and a plurality of sets of tubes, each set having continuous tubes arranged in double coils connected with said water and steam compartments, substantially as specified.

1 1. In a steam generator, awater compartment, a steam compartment, a plurality of sets of tubes, each set having continuous tubes arranged in plural coils, down takes respectively connecting said water compartment with two sets of said tubes, and upcasts respectively connecting a set of said tubes with said steam compartment, sub stantially as specified.

15. In a steam generator, a steam compartment, a water compartment, a down-take connected with said water compartment, a plurality of sets of tubes, each set having continuous tubes arranged in double coils, a junction boX connecting said down-take with said sets of tubes, a non-return valve in each of said sets of tubes, and an uptake connecting each of said sets of tubes with said steam compartment, substantially as specified.

16. In a steam generator, a structure, for containing steam and water, a set of continuous tubes connected with said structure, a non return valve in said tubes, a blow off mechanism leading from said tubes, means for introducing water into said tubes between said valve and blow off mechanism, substantially as specified.

17. In a steam generator, a water compartment, a steam compartment, a set of con tinuous tubes connected with said compartments, a valve for preventing reverse fiow from said tubes to said water compartment, a blow off mechanism leading from said tubes, means for introducing water into said tubes between said valve and blow off mechanism, and a valve for preventing reverse fiow from and said steam compartment to said tubes, substantially as specified.

18. In a steam generator, a junction box having a hand hole therein, a tube in said junction box, and a non return valve fitted to said tube, said valve being removable ghrc'lough saidhand hole, substantially asspeci- 19. In a steam generator, a structure, for containing steam and water, a set of continuous tubular feed coils connected with said structure, a set of continuous tubular evaporating coils disposed beneath said feed coils and separately connected with said structure, and a bafiie disposed between said sets of coils, substantially as specified.

20. In a steam generator, a steam and water chamber, a diaphragm dividing said chamber into an upper and lower compartment, a port through which said compartments communicate, an automatic valve for controlling said port, and a by-pass for re lieving the pressure between said compartments, substantially as specified. Y

21. In a steam generator, a steam and water chamber, a diaphragm dividing said chamber into an upper and lower compartment, a down take extending through the wall of said lower compartment and having its inlet above the bottom thereof, a set of continuous tubular coils connected with said down take tube, and an upcast connected with said coils and extending into said u per compartment, substantially as specifie In testimony whereof I have hereunto set my hand this th day of December 1904, in the presence of the subscribing witnesses.

JOHN C. PARKER.

Witnesses:

FORREST N. MAGEE, UTLEY E. CRANE, Jr. 

